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Related Concept Videos

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy

Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
Sigmoidoscopy
Sigmoidoscopy is a diagnostic procedure that uses a flexible sigmoidoscope equipped with a light source and camera to examine the rectum and sigmoid colon. The procedure involves inserting the tube through the anus...

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Related Experiment Video

Updated: Jun 26, 2026

A Cost-effective and Reliable Method to Predict Mechanical Stress in Single-use and Standard Pumps
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Endoscopic Polyp Size Measurement Using a Laser-Based Sizing Probe: Pilot Study.

Mohamed Zineddine Mahdadi1,2, Éric Cristea1,2, Megan Oleksiw1,2

  • 1MedicineCentre Hospitalier de l'Universite de MontréalMontrealCanada.

Endoscopy International Open
|June 25, 2026
PubMed
Summary
This summary is machine-generated.

A new laser-based probe accurately measures colorectal polyp size, crucial for treatment planning. However, technical challenges limited its successful application during colonoscopy procedures.

Keywords:
colorectal cancerendoscopic resection (polypectomy, ESD, EMRc,...)endoscopy lower GI tractpolyps/adenomas/...

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Area of Science:

  • Gastroenterology and Endoscopy
  • Medical Device Technology
  • Surgical Oncology

Background:

  • Accurate colorectal polyp size measurement is critical for guiding resection strategies and determining appropriate post-polypectomy surveillance intervals.
  • Current methods for polyp sizing can be imprecise, impacting clinical decision-making.
  • A novel through-the-scope laser-based probe was developed to enhance polyp measurement accuracy during colonoscopy.

Purpose of the Study:

  • To evaluate the accuracy of a through-the-scope laser-based probe for measuring colorectal polyp size.
  • To assess the probe's agreement with microscopic sizing as the reference standard.
  • To determine the probe's implementation rate, technical success, and measurement time.

Main Methods:

  • A prospective pilot study involved measuring colorectal polyps using a laser-based probe during colonoscopy.
  • Microscopic sizing served as the reference standard for assessing accuracy.
  • Primary outcome: mean bias between laser-based and microscopic measurements; Secondary outcomes: agreement, success rates, and time.

Main Results:

  • Laser-based measurements demonstrated minimal bias (-0.10 mm) and met the noninferiority margin compared to microscopic sizing (P = 0.328).
  • High agreement was observed between the laser probe and reference standard (intraclass correlation coefficient = 0.91; κ = 0.85).
  • Technical success rate was 40.9%, with limitations including measurement time and device-related issues.

Conclusions:

  • The laser-based probe provides accurate colorectal polyp sizing when measurements are successfully obtained.
  • Technical success rates were suboptimal, highlighting challenges in device implementation and usability.
  • Further refinement of the technology is needed to improve reliability and efficiency for clinical adoption.